1.3: Understand How the Results of Experiments Involving the Dilution of Coloured Solutions and Diffusion of Gases can be Explained

DILUTION OF COLOURED SOLUTIONS

Diagram Showing a Crystal of Potassium Manganate (VII) Dissolving in Water

METHOD: Fill beaker with water Add a Crystal of Potassium Manganate (VII) and record observations

RESULTS: When Potassium Manganate (VII) Crystals are Dissolved in Water, a Purple Solution Forms This occurs as both Water and Potassium Manganate (VII) Particles are moving Freely and sliding over each other, allowing them to mix to form a solution with a weaker colour than the original Crystal (original dye) As Potassium Manganate (VII) particles are less concentrated, the final colour will be weaker

DIFFUSION OF GASES

Diagram showing the Diffusion of Bromine Gas with Air

METHOD: Place a jar of air on top of a jar of Bromine Allow time for diffusion to take place and record observations

RESULTS: Overtime, Bromine Gas will diffuse upwards into the jar of air This occurs as large gaps between Air and Bromine particles allows them to move randomly and collide with each other, mixing together to form a gas with lighter shade of brown As Bromine particles are less concentrated, the final colour will be weaker